fifth wheel .co .fit it in their fivers . a mate in spain has it .after initial leaks fixed he says its ok. works well. its only another take on the alde wet radiator system . that works well even with the little rads they use.

we have the alde wet system and on a double floor van its kind of under floor heating.
alde do actually make an underfloor system that ties into their wet system although there seems to be no info on their website.

"Go Outdoors"....."Blacks"......... and even Maplins, do heated clothing, bodywarmers, trousers, gloves hats...so they probably do socks as well,...a lot cheaper, its another take on the square of carpet attached to your slippers instead of carpetting the whole house.